Composite medicine belt bubble cap type dry powder inhaler

Abstract

The utility model relates to a composite medicine belt bubble cap type dry powder inhaler, and belongs to the field of medical instruments. Comprising a main body part, a suction nozzle assembly, a counting assembly, a dosing assembly and a shell, a ratchet wheel serving as a driving wheel in the dosing assembly is embedded in a ratchet wheel gear and drives the ratchet wheel gear to rotate so that remaining gear parts in the whole device can rotate in a matched mode, and the ratchet wheel gear is in direct meshing transmission with one of counting linkage gears. The whole device is few in parts, compact in structure and convenient to install, the installation and production efficiency is improved, meanwhile, the fluency and stability of the dosing process can be guaranteed, and the compliance of a patient is improved.

Description

Technical Field

[0001] The utility model relates to a composite medicine tape blister type dry powder inhaler, which is used in conjunction with a blister aluminum tape capable of carrying a certain dose of medicine powder, wherein the blister aluminum tape has a plurality of spaced-apart blister pockets, and the blister pockets comprise pockets for placing medicine powder or peelable covers covering the pockets. Background Art

[0002] In the field of the known blister type powder inhaler technology, there are various types of device structures. The common blister type powder inhaler on the market now includes a main body, a nozzle assembly, a counting assembly, a dosing assembly and a shell structure. When the patient uses it, the rotating cover in the shell structure is opened. While exposing the nozzle, the rotating cover also serves as the operation switch of the overall inhaler, driving the gear parts in the internal dosing assembly and the counting assembly to rotate, completing a series of residual dose displays inside the device and peeling off the blister aluminum strip to expose the powder to the nozzle assembly, so that the patient's single operation can complete the inhalation preparation and the residual dose prompt work after the inhalation and dosing. When the patient opens the rotating cover, an active powder inhalation treatment can be completed by the nozzle assembly. And when the patient completes the action of inhaling powder, due to the special structure in the dosing assembly, the rotation of the gear parts in the internal components will not be caused when the rotating cover is closed. The overall blister type powder inhaler device structure is finely and cleverly connected, which simplifies the operation difficulty of the patient when using it and improves the patient's compliance to a certain extent.

[0003] However, there are still areas that need improvement in the existing blister-type powder inhaler. For example, the existing blister-type powder inhaler dosing assembly includes numerous gear components, which increases the uncertainty in the operation of the entire device; and the existing device is fixed by welding at many locations inside, which increases the difficulty of production and installation of the device. Utility Model Content

[0004] The main purpose of the utility model is to provide a compound medicine blister type dry powder inhaler with smooth drug administration and stable operation in view of the above problems.

[0005] A compound medicine tape blister type dry powder inhaler, which is used together with a blister aluminum tape capable of carrying a certain dose of medicine powder, and the compound medicine tape blister type dry powder inhaler comprises:

[0006] A main body of the overall structure of the supporting device, the main body comprising the blister aluminum strip and a mounting housing for placing the blister aluminum strip;

[0007] A mouthpiece assembly for facilitating the patient to inhale the powder, the mouthpiece assembly comprising a mouthpiece which is placed in the patient's mouth when in use and a ventilating tube for mixing airflow and powder, one end of the ventilating tube having a filter screen facing the blister aluminum strip at a specific position, and the other end facing the mouthpiece, and one side of the ventilating tube having an opening for external airflow to pass through;

[0008] A counting assembly for the remaining dose included in the gear transmission recording device is used, wherein the counting assembly includes a counter mounting plate, a counting gear set and a counter cover, and the counting gear set includes a units counter meshing gear, a units counter gear plate, a units and tens linkage gear and a tens counter gear plate;

[0009] A housing that contains all components and plays a protective role, including a rotating cover, a front cover and a rear cover, wherein the rotating cover also serves as a device operation switch, and the front cover is provided with a vent and a display window, wherein the vent is directly opposite to the opening of the vent pipe, and a part of the wheel disc surface of the gear disc of the ones counter and the gear disc of the tens counter can be displayed through the display window;

[0010] A medication component that uses gear transmission to control the direction of the blister aluminum strip, the medication component includes a gear cover plate and a medication gear set, the medication gear set uses a ratchet connected to the rotating cover as a driving wheel, the ratchet is embedded in the ratchet gear, drives it to rotate, and relies on the coordinated transmission between the ratchet gear and the remaining gears in the medication gear set to complete the overall operation, the remaining gears in the medication gear set include a pair of counter linkage gears, a transition gear, a pair of medication delivery gears and a pair of recovery flat belt gears, the recovery flat belt gear is composed of three parts, including a belt gear shaft, a spring and a hub ring, the spring is sleeved on the belt gear shaft, and the hub ring is sleeved on the spring;

[0011] A housing that contains all components and plays a protective role, including a rotating cover, a front cover and a rear cover, wherein the rotating cover also serves as a device operation switch, and the front cover is provided with a vent and a display window, wherein the vent is directly opposite to the opening of the vent pipe, and a part of the wheel disc surface of the gear disc of the ones counter and the gear disc of the tens counter can be displayed through the display window;

[0012] Furthermore, the ratchet gear is directly meshed with one of the counter linkage gears for transmission.

[0013] Furthermore, the mounting shell divides the blister aluminum tape into a medicine-carrying tape, a blister empty tape and an aluminum tape flat tape, wherein the medicine-carrying tape is the unused portion of the blister aluminum tape, the blister empty tape is the medicine-carrying blister portion of the original blister aluminum tape after use, and the aluminum tape flat tape is the sealed and peelable portion of the original blister aluminum tape after use, wherein the medicine-carrying tape is placed at the lower end position of the mounting shell, and a channel is provided at the outer side position of the mounting shell for the medicine-carrying tape to pass through to the bottom of the ventilation tube, and the width of the channel is 2.5 mm.

[0014] Furthermore, the gear cover plate is provided with a gear cover plate positioning hole facing each other, and the mounting shell is provided with a gear cover plate positioning column at a corresponding position, and the gear cover plate and the mounting shell are fixed with double buckles after being positioned facing each other.

[0015] Furthermore, the gear plate of the tens counter is the same size as the gear plate of the ones counter, and the gear plate of the tens counter has an arc-shaped notch inside, which can cooperate to display a partial plane of the gear plate of the ones counter, and the distance between the numbers on the gear plate of the ones counter and the outermost edge of its plane is the distance from the outermost edge of the gear plate of the tens counter to the outermost edge of the arc-shaped notch inside it.

[0016] Furthermore, a group of numbers 0-N are arranged along the circumferential direction at the outermost edge of the plane of the tens counter gear plate, wherein N is a number greater than or equal to 1, and a group of numbers 0-9 are arranged along the circumferential direction at the offset position of the outer edge of the plane of the ones counter gear plate.

[0017] Preferably, the distance between the numbers on the ones counter gear plate and the outermost edge of its plane is the distance from the outermost edge of the tens counter gear plate to the outermost edge of the arc-shaped notch inside it.

[0018] Furthermore, one or more flat belt fixing columns are provided on a single side surface of the hub ring in the recycling flat belt gear, and the height of the flat belt fixing columns is up to the line along the outer edge of the hub ring.

[0019] Preferably, two ends of the spring in the recovery flat belt gear are bent toward the inside and the outside of the spring respectively.

[0020] Preferably, in the belt gear shaft in the recycling flat belt gear, the shaft end has a spring fixing hole for fixing with the inwardly bent end of the spring.

[0021] Furthermore, a plurality of small holes are opened below the ventilation tube, which are respectively combined to form a bubble inlet and a bubble outlet, and the bubble inlet and the bubble outlet are arranged in an arc.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] 1. The total number of gears included in the drug delivery component is reduced, making the overall drive structure more compact, and the transmission between the gears more concise and clear, reducing the device operation errors caused by transmission errors between gears, and ensuring the stability of drug delivery operation.

[0024] 2. The route of the blister aluminum strip is clearly and reasonably divided, and the reserved space can ensure the smooth passage of the blister aluminum strip without jamming or accumulation, thus ensuring the smoothness of the entire inhaler drug delivery.

[0025] 3. Each mounting plate inside the device is assembled by first positioning and then snapping together, which reduces the difficulty of installation during industrial production and makes the installation steps convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments of the present invention, in which:

[0027] Figure 1 It is a schematic diagram of the locations of the components of a three-dimensional structure of a compound medicine blister-type dry powder inhaler in one direction according to a preferred embodiment of the utility model;

[0028] Figure 2 It is a schematic diagram of the exploded parts position of the three-dimensional structure of a compound medicine blister type dry powder inhaler in one direction according to a preferred embodiment of the utility model;

[0029] Figure 3 It is a schematic diagram of the exploded parts position of the three-dimensional structure of the compound medicine blister type dry powder inhaler in another direction according to a preferred embodiment of the utility model;

[0030] Figure 4 is a schematic diagram of an expanded housing assembly according to a preferred embodiment of the utility model;

[0031] Figure 5 It is a front view of a compound medicine blister type dry powder inhaler in an open state according to a preferred embodiment of the utility model;

[0032] Figure 6 It is a cross-sectional view of a compound medicine blister type dry powder inhaler according to a preferred embodiment of the utility model;

[0033] Figure 7 It is a schematic diagram of the three-dimensional structure decomposition of a drug delivery assembly according to a preferred embodiment of the utility model;

[0034] Figure 8 is an exploded view of a recycling flat belt gear in one direction according to a preferred embodiment of the utility model;

[0035] Fig. 9is an exploded view of a recycling flat belt gear in another direction according to a preferred embodiment of the utility model;

[0036] Fig.10 is a front view of a portion of a drug delivery assembly according to a preferred embodiment of the utility model;

[0037] Fig.11 It is a three-dimensional structural schematic diagram of a drug delivery assembly in a mating state according to a preferred embodiment of the utility model;

[0038] Fig.12 is a front view of a vent pipe according to a preferred embodiment of the utility model;

[0039] Fig.13 is a side cross-sectional view of a vent pipe according to a preferred embodiment of the utility model;

[0040] Fig.14 It is an inverted schematic diagram of a vent pipe in one direction according to a preferred embodiment of the utility model;

[0041] Fig.15 It is a front view of a counting assembly in a mating state according to a preferred embodiment of the utility model;

[0042] Fig.16 This is a schematic diagram of the three-dimensional structure of a counting gear set according to a preferred embodiment of the utility model;

[0043] Among them: 1-rotating cover, 2-front cover, 3-back cover, 4-sucking nozzle, 5-ventilation tube, 6-blister aluminum strip, 7-mounting shell, 8-counter mounting plate, 9-gear cover plate, 10-dosing gear set, 11-counting gear set, 12-vent, 13-display window, 14-pinching groove, 15-ratchet, 16-ratchet gear, 17a / 17b-counter linkage gear, 18-transition gear, 19a / 19b-dosing delivery gear, 20a / 20b-recovery flat belt gear, 21-unit counter meshing gear, 22-unit counter gear plate, 23-unit and tens linkage gear, 24-tens counter gear plate, 25-counter cover, 26- Elastic gear teeth, 27-gear tooth position, 28-limiting protrusion, 29-aluminum belt flat belt, 30-blister empty belt, 31-drug-loaded belt, 32-unit counter teeth, 33-tens counter gear notch, 34a / 34b-gear cover positioning hole, 35a / 35b-gear cover positioning column, 36-gear shaft, 37-spring, 38-wheel hub ring, 39-spring fixing hole, 40-flat belt fixing column, 41-mixing air inlet, 42-dosing air inlet, 43-blister inlet, 44-blister outlet, 45-dosing outlet, 101-housing, 102-nozzle assembly, 103-counting assembly, 104-dosing assembly, 105-main part. DETAILED DESCRIPTION

[0044] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0045] Figures 1 to 4 A preferred embodiment of the compound medicine blister type dry powder inhaler of the utility model is shown. Similar to the conventional structure, it also includes: a main body 105, a mouthpiece assembly 102, a counting assembly 103, a drug delivery assembly 104 and a housing 101 and other structural components. Among them:

[0046] The housing 101 contains all components for protection, including a rotating cover 1, a front cover 2 and a rear cover 3. The rotating cover 1 also serves as a switch for the device to operate.

[0047] The nozzle assembly 102 is convenient for the patient to inhale the powder, and includes a nozzle 4 that is placed in the patient's mouth when in use, and a ventilation tube 5 for mixing airflow and powder. One end of the ventilation tube 5 has a filter screen facing a blister aluminum strip 6 at a specific position, and the other end faces the nozzle 4. At the same time, one side of the ventilation tube 5 has an opening for external airflow to pass through.

[0048] The remaining dose counting assembly 103 included in the gear transmission recording device includes a counter mounting plate 8, a counting gear set 11 and a counter cover 25. The counting gear set 11 includes a units counter meshing gear 21, a units counter gear plate 22, a units and tens linkage gear 23 and a tens counter gear plate 24.

[0049] The dosing assembly 104 that uses gear transmission to control the direction of the blister aluminum strip 6 includes a gear cover plate 9 and a dosing gear set 10. The dosing gear set 10 includes a ratchet 15, a ratchet gear 16, a counter linkage gear 17a / 17b, a transition gear 18, a dosing conveying gear 19a / 19b and a recovery flat belt gear 20a / 20b.

[0050] The main body part 105 of the overall structure of the supporting device includes a blister aluminum strip 6 and a mounting shell 7 for placing the blister aluminum strip 6 .

[0051] like Figure 5As shown, the front cover 2 in the housing 101 is provided with a vent 12 and a display window 13. The vent 12 is directly opposite to the side opening of the ventilation tube 5 inside the device, which is convenient for airflow to flow in. When the patient uses inhalation, the powder and the airflow are disturbed, which improves the applicability of the device. The display window 13 can display part of the wheel surface of the ones counter gear plate 22 and the tens counter gear plate 24, so that the patient can know the remaining powder dosage in the device. The rotating cover 1 is provided with a pinching groove 14, which is convenient for the patient to rotate the rotating cover 1 to open it and expose the internal suction nozzle 4 when using it.

[0052] like Figure 6-11 As shown, the mounting shell 7 divides the packaging aluminum strip 6 into a drug-carrying strip 31, a blister empty strip 30 and an aluminum strip flat strip 29. The drug-carrying strip 31 is the unused part of the blister aluminum strip 6, the blister empty strip 30 is the drug-carrying blister part of the original blister aluminum strip 6 after use, and the aluminum strip flat strip 29 is the sealed and peelable part of the original blister aluminum strip 6 after use. The drug-carrying strip 31 is located at the lower end of the mounting shell 7, the blister empty strip 30 is located in the middle of the mounting shell 7, and the aluminum strip flat strip 29 is located at the upper end of the mounting shell 7. The mounting shell 7 is provided with channels at both ends of the vertical outer side for the drug-carrying strip 31 to pass through, and it goes to the lower end of the vent pipe 5.

[0053] In the dosing gear set 10, the ratchet 15 is engaged with the rotating cover 1, and the ratchet 15 is embedded in the ratchet gear 16. The back teeth of the ratchet gear 16 are directly engaged with the counter linkage gear 17a, the transition gear 18, and the dosing delivery gear 19a. The transition gear 18 is also engaged with the counter linkage gear 17b, and the dosing delivery gear 19a is engaged with the dosing delivery gear 19b. The dosing delivery gears 19a / 19b are respectively engaged with the recovery flat belt gears 20a / 20b, so that when the patient uses the device to open the rotating cover, the rotating cover 1 rotates to drive the ratchet 15 to rotate in a clockwise direction, and at the same time, the ratchet gear 16 rotates in a clockwise direction, driving the counter linkage gear 17a, the transition gear 18, and the dosing delivery gear 19a to rotate in a counterclockwise direction, the counter linkage gear 17b, the recovery flat belt gear 20a and the dosing delivery gear 19b rotate in a clockwise direction, and the recovery flat belt gear 20b rotates in a counterclockwise direction.

[0054] The ratchet 15 is provided with elastic gear teeth 26, and the ratchet gear 16 is provided with gear tooth positions 27, and the two are the same in number. At the same time, a limiting protrusion 28 is provided on the gear cover plate 9. The three cooperate so that only when the patient opens the rotating cover 1, that is, the ratchet 15 rotates clockwise, the elastic gear teeth 26 of the ratchet 15 are in the expanded state, and the elastic gear teeth will contact with the gear tooth positions 27 of the ratchet gear 16, pushing the ratchet gear 16 to rotate synchronously clockwise. At this time, the limiting protrusion 28 on the gear cover plate 9 does not limit the ratchet gear 16, the overall drug delivery component 104 is activated, and the drug delivery gear set 10 performs transmission operation; and when the patient closes the rotating cover 1, that is, the ratchet 15 rotates counterclockwise, the limiting protrusion 28 will limit the ratchet gear 16 from synchronous operation, the overall drug delivery component 104 is not activated, and the drug delivery gear set 10 does not perform transmission operation. At this time, the elastic gear teeth 26 on the ratchet 15 are under pressure and in a compressed state, so the patient's action of closing the rotating cover 1 will not be restricted.

[0055] The non-gear end portion of the recovery flat belt gear 20a / 20b is connected to the aluminum belt flat belt 29, the non-gear end portion of the dosing conveying gear 19a / 19b corresponds to the lower end of the ventilation tube 5, and the non-gear end portion of the counter linkage gear 17a / 17b is connected to the blister empty carrier belt 30. When the dosing assembly 104 is activated, the dosing gear set 10 performs transmission operation, so that the blister aluminum belt 6 is pulled to the non-gear end portion of the dosing conveying gear 19a / 19b, and the drug-carrying belt 31 is peeled off and divided into the aluminum belt flat belt 29 and the blister empty carrier belt 30.

[0056] like Figure 8-9 As shown, the recovery flat belt gear 20a / 20b is composed of three parts: a gear shaft 36, a spring 37 and a hub ring 38. The gear shaft 36 can be regarded as a gear plate and a shaft body, which are an integrated structure. A spring fixing hole 39 is provided on the shaft body of the gear shaft 36. The two ends of the spring 37 are respectively bent inward and outward, and the inward end bend cooperates with the spring fixing hole 39, so that the spring 37 can be sleeved and fixed on the gear shaft 36. The hub ring 38 is cylindrical in shape, and has two parallel flat belt fixing columns 40 on the side end surface. Two holes are correspondingly set at the starting end of the aluminum belt flat belt 29, which can be sleeved on the flat belt fixing column 40 to ensure that the aluminum belt flat belt 29 is pulled as the recovery flat belt gear 20a / 20b rotates. The top surface of the flat belt fixing column 40 is in contact with the outer edge of the hub ring 38, so that the aluminum belt flat belt 29 is stored in the form of a perfect circle. The hub ring 38 has a plurality of structural ribs inside, which can be used to fix the outward bent end of the spring 37, ensuring that when the hub ring 38 and the gear shaft 36 rotate in opposite directions relative to each other, the spring 37 will exert a certain force on the hub ring 38 due to torsion, thereby ensuring the smoothness of the overall drug delivery process.

[0057] The gear cover plate 9 is provided with gear cover plate positioning holes 34a / 34b facing each other, and the mounting housing 7 is provided with gear cover plate positioning columns 35a / 35b at corresponding positions. The gear cover plate 9 and the mounting housing 7 are fixed with double buckles.

[0058] like Figure 12-14 As shown, the opening portion of the vent pipe 5 corresponding to the vent port 12 is divided into a plurality of mixing air inlets 41 and a dosing air inlet 42, and the lower end of the vent pipe 5 has a plurality of small holes, which are respectively combined to form a blister inlet 43 and a blister outlet 44. During normal operation of the device, the blister inlet 43 and the blister outlet 44 are located above the drug-containing blister from which the aluminum strip flat strip 29 has been peeled off, and the two are arranged in an arc so that the inside of the blister is disturbed when the airflow passes through, so that the drug powder is initially dispersed.

[0059] During use by the patient, the external air flow enters the ventilation tube 5 through the dosing air inlet 42, flows through the blister inlet 43 and enters the blister containing the medicine from which the aluminum strip flat band 29 has been peeled off, and the air flow drives the medicine powder in the blister to pass through the blister outlet 44. At this time, the medicine powder is mixed with the air entering from the mixing air inlet 41 in the ventilation tube 5. After the medicine powder is mixed and dispersed, it enters the suction nozzle 4 through the dosing outlet 45 and is finally inhaled by the patient through the suction nozzle 4.

[0060] like Figure 15-16 As shown, the tens counter gear plate 24 is the same size as the ones counter gear plate 22. The tens counter gear plate 24 has an arc-shaped notch inside, which can cooperate to display a partial plane of the ones counter gear plate 22. A group of numbers 0-3 are arranged in the counterclockwise direction of the circumference at the outermost edge of the plane of the tens counter gear plate 24, and a group of numbers 0-9 are arranged in the clockwise direction of the circumference at the offset position of the outer edge of the plane of the ones counter gear plate 22. The distance between the numbers on the ones counter gear plate 22 and the outermost edge of its plane is the distance from the outermost edge of the tens counter gear plate 24 to the outermost edge of the arc-shaped notch inside it.

[0061] In the dosing gear set 10, the non-gear end of the counter linkage gear 17a can be engaged with the units counter meshing gear 21 in the counting gear set 11, and the units counter meshing gear 21 is directly meshed with the units counter gear disk 22. Therefore, when the patient opens the rotating cover 1, the counter linkage gear 17a will drive the units counter meshing gear 21 to rotate counterclockwise, and the units counter gear disk 22 will rotate clockwise, so that the units digit of the remaining dose is in a countdown state.

[0062] A single ones counter latching tooth 32 is provided in the inner ring of the gear of the ones counter gear plate 22, and the ones counter latching tooth 32 will mesh with the ones and tens linkage gear 23 once when the ones counter gear plate 22 rotates one circle, and the ones and tens linkage gear 23 directly meshes with the tens counter gear plate 24, so that when the ones counter gear plate 22 rotates one circle, the tens counter gear plate 24 only rotates one latching tooth position. When the patient opens the rotating cover 1, the ones and tens linkage gear 23 rotates asynchronously clockwise, driving the tens counter gear plate 24 to rotate counterclockwise, so that the tens digit of the remaining dose is in a countdown state.

[0063] When the tens counter gear disc 24 moves to a certain angle, the tens counter gear notch 33 will rotate to the original meshing position of the tens counter gear disc 24 and the ones and tens linkage gear 23, so that the two become non-meshing state. At this time, only a blank wheel disc surface can be observed through the display window 13 on the front cover 2, that is, all the powder in the device has been used up.

[0064] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or positional relationship are only for the convenience of describing the present invention in a simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0065] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A compound medicine tape blister type dry powder inhaler, which is used together with a blister aluminum tape capable of carrying a certain dose of medicine powder, and the compound medicine tape blister type dry powder inhaler comprises: A main body of the overall structure of the supporting device, the main body comprising the blister aluminum strip and a mounting housing for placing the blister aluminum strip; A mouthpiece assembly for facilitating the patient to inhale the powder, the mouthpiece assembly comprising a mouthpiece which is placed in the patient's mouth when in use and a ventilating tube for mixing airflow and powder, one end of the ventilating tube having a filter screen facing the blister aluminum strip at a specific position, and the other end facing the mouthpiece, and one side of the ventilating tube having an opening for external airflow to pass through; A counting assembly for the remaining dose included in the gear transmission recording device is used, wherein the counting assembly includes a counter mounting plate, a counting gear set and a counter cover, and the counting gear set includes a units counter meshing gear, a units counter gear plate, a units and tens linkage gear and a tens counter gear plate; A housing that contains all components and plays a protective role, including a rotating cover, a front cover and a rear cover, wherein the rotating cover also serves as a device operation switch, and the front cover is provided with a vent and a display window, wherein the vent is directly opposite to the opening of the vent pipe, and a part of the wheel disc surface of the gear disc of the ones counter and the gear disc of the tens counter can be displayed through the display window; A medication component that uses gear transmission to control the direction of the blister aluminum strip, the medication component includes a gear cover plate and a medication gear set, the medication gear set uses a ratchet connected to the rotating cover as a driving wheel, the ratchet is embedded in the ratchet gear, drives it to rotate, and relies on the coordinated transmission between the ratchet gear and the remaining gears in the medication gear set to complete the overall operation, the remaining gears in the medication gear set include a pair of counter linkage gears, a transition gear, a pair of medication delivery gears and a pair of recovery flat belt gears, the recovery flat belt gear is composed of three parts, including a belt gear shaft, a spring and a hub ring, the spring is sleeved on the belt gear shaft, and the hub ring is sleeved on the spring; The invention is characterized in that the ratchet gear is directly meshed with one of the counter linkage gears for transmission.

2. The compound medicine blister type dry powder inhaler according to claim 1, characterized in that: The installation shell divides the blister aluminum tape into a medicine-carrying tape, a blister empty tape and an aluminum tape flat tape, wherein the medicine-carrying tape is the unused portion of the blister aluminum tape, the blister empty tape is the medicine-carrying blister portion of the original blister aluminum tape after use, and the aluminum tape flat tape is the sealed and peelable portion of the original blister aluminum tape after use, wherein the medicine-carrying tape is placed at the lower end position of the installation shell, and a channel is provided at the outer side position of the installation shell for the medicine-carrying tape to pass through to the bottom of the ventilation tube, and the width of the channel is 2.5 mm.

3. The compound medicine blister type dry powder inhaler according to claim 2, characterized in that: The gear cover plate is provided with a gear cover plate positioning hole facing each other, and the mounting shell is provided with a gear cover plate positioning column at a corresponding position. The gear cover plate and the mounting shell are fixed with double buckles after facing each other.

4. The compound medicine blister type dry powder inhaler according to claim 1, characterized in that: The gear plate of the tens counter is the same size as the gear plate of the ones counter. The gear plate of the tens counter has an arc-shaped notch inside, which can cooperate to display a partial plane of the gear plate of the ones counter. The distance between the numbers on the gear plate of the ones counter and the outermost edge of its plane is the distance from the outermost edge of the gear plate of the tens counter to the outermost edge of the arc-shaped notch inside it.

5. The compound medicine blister type dry powder inhaler according to claim 1, characterized in that: One or more flat belt fixing columns are arranged on a single side surface of the hub ring in the flat belt recovery gear, and the height of the flat belt fixing columns reaches the line along the outer edge of the hub ring.

6. The compound medicine blister type dry powder inhaler according to claim 1, characterized in that: The two ends of the spring in the recovery flat belt gear are bent toward the inside and the outside of the spring respectively.

7. The compound medicine blister type dry powder inhaler according to claim 6, characterized in that: In the belt gear shaft of the recycling flat belt gear, the shaft end has a spring fixing hole for fixing with the inwardly bent end of the spring.

8. The compound medicine blister type dry powder inhaler according to claim 1, characterized in that: A plurality of small holes are provided below the ventilation tube, which are respectively combined to form a bubble inlet and a bubble outlet, and the bubble inlet and the bubble outlet are arranged in an arc.

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